Every May 1st, the Guerlain clientele can wear that year's limited edition of Guerlain Muguet which celebrates the "good luck" charm that lily of the valley stands for. The tradition of re-issuing the Muguet (i.e. Lily of the Valley) perfume dates from 2006 and you can find an article with the history and the bottles of the different annual edition of Guerlain Muguet on this link.
This year Guerlain appealed to ceramist Brigitte de Bazelaire (associated with Porcelaines de la Fabrique who manufacture Limoges china since 1825). The process requires a double "baking" at more than 1000 degrees Centigrade.
The white biscuit porcelain container contains a bee bottle with a white bow and pale green liquid inside. The design reprises the style of Les Parisiennes, the boutique line sold at boutiques and espaces Guerlain. The scent is a realistic lily of the valley soliflore with additional notes of jasmine, bergamot and rose. The 2014 Guerlain Muguet edition is presented in 1872 numbered bottles internationally sold for 400 euros for 125ml, available from May 1st and for only a few days.
There also other news for Guerlain maniacs:
First of all a discontinuation, though I'm expecting it won't go down with too much wailing: Guerlain L'Homme Eau (2010) is discontinued, a rumor which was originally reported on Mr.Guerlain's page and officially confirmed by Guerlain. Available therefore only while stocks last.
But there is also a reissue: Idylle Duet Rose Patchouli (from 2011), a flanker to the original Idylle, more info on which you can read on the linked article
Last but not least, Terracota le Parfum is a limited edition to celebrate 30 years of Terracotta products which have made the reputation of Guerlain makeup to the widths of the globe. This is a solar fragrance (reminiscent of summer via its salicylates allusions, not different than the effect in Terracotta Voile d'Ete most probably) and you can see a linked picture of the bottle on Instagram.